Une explication du phonopore, se rapportant plus spécialement au télégraphe phonopore simplex
By: par C. Langdon-Davies ; illustrée et traduite en français = An explanation of the phonopore, and more especially of the simplex phonopore telegraph / by C. Langdon-Davies ; illustrated, and printed in English and French.
Publisher: K. Paul, Trench, Trübner
Published: 1891
Place of publication: Londres
Language: fre
Number of pages: 68
Other titles: Explanation of the phonopore, and more especially of the simplex phonopore telegraph.